2608678813 has 8 divisors (see below), whose sum is σ = 2810872568. Its totient is φ = 2406703104.

The previous prime is 2608678811. The next prime is 2608678817. The reversal of 2608678813 is 3188768062.

It can be written as a sum of positive squares in 4 ways, for example, as 17665209 + 2591013604 = 4203^2 + 50902^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2608678813 - 2¹ = 2608678811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2608678811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29220 + ... + 77917.

It is an arithmetic number, because the mean of its divisors is an integer number (351359071).

Almost surely, 2^2608678813 is an apocalyptic number.

It is an amenable number.

2608678813 is a deficient number, since it is larger than the sum of its proper divisors (202193755).

2608678813 is a wasteful number, since it uses less digits than its factorization.

2608678813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109023.

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 2608678813 is about 51075.2269990061. The cubic root of 2608678813 is about 1376.5971634310.

The spelling of 2608678813 in words is "two billion, six hundred eight million, six hundred seventy-eight thousand, eight hundred thirteen".